Uryu: Tortonian, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Mammalia
- Cetacea
- Delphinidae
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Delphinidae indet.
Gray 1821
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1 specimen | ||||||
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= Stenella kabatensis n. sp.
Horikawa 1977
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Horikawa 1977 | ||||||
| recombined as Eodelphinus kabatensis | |||||||
| see common names | |||||||
Geography
| Country: | Japan | State/province: | Hokkaido |
| Coordinates: | 43.7° North, 141.7° East (view map) | ||
| Paleocoordinates: | 44.1° North, 140.4° East | ||
| Basis of coordinate: | stated in text |
Time
| Period: | Neogene | Epoch: | Miocene |
| Stage: | Tortonian | 10 m.y. bin: | Cenozoic 6 |
| Key time interval: | Tortonian | ||
| Age range of interval: | 11.63000 - 7.24600 m.y. ago |
Stratigraphy
| Geological group: | Shintotsukawa | Formation: | Mashike | Member: | Lower Mud |
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: the potential age of Eodelphis is between 8.5 and 13.0 Ma. However, the maximum age of Eodelphis may be relatively younger (ca. 9 Ma) within this range, because the holotype came from near the upper limit of the mud- stone unit of the Mashike Formation. | |||||
Lithology and environment
| Primary lithology: | mudstone |
| Includes fossils? | Y |
| Environment: | marine indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Reason for describing collection: | general faunal/floral analysis |
Metadata
| Database number: | 75993 | ||
| Authorizer: | M. Uhen | Enterer: | M. Uhen |
| Modifier: | M. Uhen | Research group: | vertebrate |
| Created: | 2007-11-08 07:43:19 | Last modified: | 2018-07-03 10:18:35 |
| Access level: | the public | Released: | 2007-11-08 07:43:19 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 41393. | H. Horikawa and I. Fujita. 1972. A fossil dolphin from the Miocene deposits of Kabato Mountainland, Hokkaido, Japan. Earth Science 26:176-177 [M. Uhen/M. Uhen] |
Secondary references:
| 14508 | H. Horikawa. 1977. A new species of fossil dolphin from the Miocene deposits of Kabato Mountainland, Hokkaido, Japan. Chikyu kagaku 31(3):97-114 [M. Uhen/M. Uhen/M. Uhen] | |
| 51115 | M. Murakami, C. Shimada, Y. Hikidad, Y. Soedae, and H. Hirano. 2014. Eodelphis kabatensis, a new name for the oldest true dolphin Stenella kabatensis Horikawa, 1977 (Cetacea, Odontoceti, Delphinidae), from the upper Miocene of Japan, and the phylogeny and paleobiogeography of Delphinoidea. Journal of Vertebrate Paleontology 34(3):491-511 [M. Uhen/M. Uhen] | |
| 12148 | M. Oishi and Y. Hasegawa. 1995. A list of fossil cetaceans in Japan. The Island Arc 3:493-505 [M. Uhen/M. Uhen/M. Uhen] |